Fill a squeeze bottle, flavor injector, or syringe with jelly, jam, custard etc. and inject a little into each doughnut. Or leave plain.

Sprinkle each doughnut with confectioner's sugar or roll in confectioner's sugar or shake 3 at a time in a paper bag with confectioner's sugar.

If needed you can make your own self-rising flour by mixing 8 cups of flour with 1 Tablespoon of salt and 5 Tablespoons of double acting baking powder. Blend and store in an air tight container labeled "SELF-RISING".